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Title:
METHOD FOR COLLECTING LEAD FROM CEMENT PRODUCTION PROCESS, AND COLLECTING APPARATUS THEREFOR
Document Type and Number:
Japanese Patent JP2008190019
Kind Code:
A
Abstract:

To efficiently decrease a lead content in cement without affecting the quality of the cement.

The lead-collecting apparatus comprises: a chlorination-volatilizing furnace 2 which is installed adjacent to a cement-firing facility, and chlorinates and volatilizes lead contained in a charged lead-containing raw material (M) and the like; and a lead-collecting means 3 for collecting the lead from an exhaust gas of the furnace 2. The method for efficiently collecting lead from a cement production process includes: making the chlorination-volatilizing furnace 2 volatilize the lead in the lead-containing cement raw material (M) by using chlorine contained in a chlorination source (C); and making the lead-collecting means 3 collect the volatilized lead. The lead-collecting means 3 may have a dust-collecting means for collecting dust in the exhaust gas of the chlorination-volatilizing furnace 2. A heat source for the chlorination-volatilizing furnace 2 may be supplied by extracting the exhaust gas of the cement-firing facility from the cement-firing facility and introducing the gas into the chlorination-volatilizing furnace 2, or by sending one part of a raw material discharged from a cyclone 12 in the lowest stage of a pre-heater to a chlorination-volatilizing furnace 42. Burnt ash of municipal waste can be effectively used as a chlorination source (C) for the chlorination-volatilizing furnaces 2 and 42.


Inventors:
OKAMURA SOICHIRO
Application Number:
JP2007027972A
Publication Date:
August 21, 2008
Filing Date:
February 07, 2007
Export Citation:
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Assignee:
TAIHEIYO CEMENT CORP
International Classes:
C22B13/02; B09B3/00; B09C1/02; B09C1/06; B09C1/08; C04B7/44; C22B7/02; F27D17/00
Attorney, Agent or Firm:
Jun Nakai